Segmentation fault (core dumped) after erase some bodies

Hi,
I'd like to delete particles which has connection to other particles, I read some answers and follows the suggestion in [1].
The outcome is unstable, when I use "example one" to generate particles, Segmentation fault (core dumped) occurs. While when I comment "example one" and use "example two" to generate particles, it works well. Here is the MWE:

from yade import pack, plot

########## example one which leads to Segmentation fault#####
for i in range(10):
    O.bodies.append(sphere((0, 0, i), radius=1, color=[1, 1, 1]))

O.bodies.append(sphere((5,5,5),radius=1,color=[1,1,1]))
######## example two which works well #####
# O.bodies.append(sphere((0,0,0),radius=1,color=[1,1,1]))
# O.bodies.append(sphere((0,1,0),radius=1,color=[1,1,1]))
# O.bodies.append(sphere((0,2,0),radius=1,color=[1,1,1]))
# O.bodies.append(sphere((3,0,0),radius=1,color=[1,1,1]))
# O.bodies.append(sphere((3,1,1),radius=1,color=[1,1,1]))
# O.bodies.append(sphere((5,5,5),radius=1,color=[1,1,1]))

O.engines=[
    ForceResetter(),
    InsertionSortCollider([Bo1_Sphere_Aabb()]),
    InteractionLoop(
        [Ig2_Sphere_Sphere_ScGeom()],
        [Ip2_FrictMat_FrictMat_FrictPhys()],
        [Law2_ScGeom_FrictPhys_CundallStrack()]
    ),
    NewtonIntegrator(damping=0.4),
]

Ids=[]
for i in O.bodies:
    Ids.append(i.id)

O.step()

BodiesToBeDel=[]
def findBodiesToBeDel():
    for i in Ids:
        for j in Ids:
            if i>=j:
                continue
            else:
                if O.interactions.has(i,j):
                    BodiesToBeDel.append(O.bodies[i])
                    BodiesToBeDel.append(O.bodies[j])
findBodiesToBeDel()
def eraseOverlapBodies():
    for i in BodiesToBeDel:
        O.bodies.erase(i.id)

eraseOverlapBodies()

My yade version is 2018.02b on Ubuntu 18.04.
Do you know what is the problem?
many thanks
Leonard
[1]https://answers.launchpad.net/yade/+question/211937